Self made voltage regulator doesn't work

[ezesolares]

Hello

I'm trying to make a voltage regulator, and it work but under certain conditions it doesn't work as it have to.

I put my reference so i get 15V as output

At low current, i can get 15V output. (15mA)
At high current, i can only get 12V output (100mA)

I put my reference so i get 10V as output
I can get any current i want.

The IN voltage to be regulated is 17V, the opamp is powered with +-12V

I don't know where is the flaw in my "more than common" design
In the simulators (Microcap, multisim) it work ok, but in real-life it doesn't



Thank in advance

Ezequiel
PD: Sorry for my bad english

[cadstarsucks]

The schematic looks fine, but one would expect that if it works in simulation. 

The one thing that comes to mind is wiring the transistors wrong.  Check your wiring against the actual manufacturers data sheet.

Dan